/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:04:47,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:04:47,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:04:47,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:04:47,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:04:47,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:04:47,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:04:47,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:04:47,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:04:47,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:04:47,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:04:47,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:04:47,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:04:47,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:04:47,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:04:47,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:04:47,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:04:47,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:04:47,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:04:47,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:04:47,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:04:47,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:04:47,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:04:47,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:04:47,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:04:47,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:04:47,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:04:47,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:04:47,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:04:47,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:04:47,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:04:47,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:04:47,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:04:47,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:04:47,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:04:47,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:04:47,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:04:47,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:04:47,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:04:47,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:04:47,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:04:47,347 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:04:47,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:04:47,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:04:47,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:04:47,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:04:47,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:04:47,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:04:47,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:04:47,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:04:47,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:04:47,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:04:47,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:04:47,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:04:47,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:04:47,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:04:47,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:04:47,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:04:47,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:04:47,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:04:47,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:04:47,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:04:47,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:04:47,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:04:47,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:04:47,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:04:47,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:04:47,777 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:04:47,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de51.c [2020-12-23 07:04:47,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dcf7b798c/afc653e1d4ed47e1b0e660ed593bdcf4/FLAG64f4ac388 [2020-12-23 07:04:48,408 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:04:48,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c [2020-12-23 07:04:48,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dcf7b798c/afc653e1d4ed47e1b0e660ed593bdcf4/FLAG64f4ac388 [2020-12-23 07:04:48,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dcf7b798c/afc653e1d4ed47e1b0e660ed593bdcf4 [2020-12-23 07:04:48,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:04:48,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:04:48,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:04:48,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:04:48,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:04:48,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:04:48" (1/1) ... [2020-12-23 07:04:48,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfd9d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:48, skipping insertion in model container [2020-12-23 07:04:48,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:04:48" (1/1) ... [2020-12-23 07:04:48,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:04:48,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:04:49,016 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2020-12-23 07:04:49,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:04:49,066 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:04:49,083 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2020-12-23 07:04:49,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:04:49,129 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:04:49,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49 WrapperNode [2020-12-23 07:04:49,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:04:49,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:04:49,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:04:49,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:04:49,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:04:49,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:04:49,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:04:49,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:04:49,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... [2020-12-23 07:04:49,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:04:49,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:04:49,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:04:49,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:04:49,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:04:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:04:49,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:04:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:04:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:04:49,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:04:49,775 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 07:04:49,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:04:49 BoogieIcfgContainer [2020-12-23 07:04:49,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:04:49,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:04:49,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:04:49,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:04:49,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:04:48" (1/3) ... [2020-12-23 07:04:49,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7ed1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:04:49, skipping insertion in model container [2020-12-23 07:04:49,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:04:49" (2/3) ... [2020-12-23 07:04:49,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7ed1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:04:49, skipping insertion in model container [2020-12-23 07:04:49,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:04:49" (3/3) ... [2020-12-23 07:04:49,788 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2020-12-23 07:04:49,795 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:04:49,800 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:04:49,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:04:49,853 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:04:49,854 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:04:49,854 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:04:49,854 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:04:49,854 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:04:49,854 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:04:49,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:04:49,855 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:04:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 07:04:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:04:49,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:49,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:49,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2020-12-23 07:04:49,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:49,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401971578] [2020-12-23 07:04:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:50,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401971578] [2020-12-23 07:04:50,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:04:50,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:04:50,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339421911] [2020-12-23 07:04:50,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:04:50,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:50,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:04:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:04:50,211 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-23 07:04:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:50,233 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2020-12-23 07:04:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:04:50,235 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 07:04:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:50,248 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:04:50,249 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:04:50,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:04:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:04:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:04:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:04:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2020-12-23 07:04:50,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2020-12-23 07:04:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:50,296 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2020-12-23 07:04:50,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:04:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2020-12-23 07:04:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:04:50,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:50,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:50,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:04:50,298 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2020-12-23 07:04:50,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:50,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495248169] [2020-12-23 07:04:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495248169] [2020-12-23 07:04:50,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:04:50,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:04:50,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78263710] [2020-12-23 07:04:50,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:04:50,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:04:50,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:04:50,490 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2020-12-23 07:04:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:50,553 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2020-12-23 07:04:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:04:50,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 07:04:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:50,555 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:04:50,555 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:04:50,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:04:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:04:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 07:04:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:04:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2020-12-23 07:04:50,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2020-12-23 07:04:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:50,562 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2020-12-23 07:04:50,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:04:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2020-12-23 07:04:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:04:50,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:50,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:50,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:04:50,564 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2020-12-23 07:04:50,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:50,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309275773] [2020-12-23 07:04:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309275773] [2020-12-23 07:04:50,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:04:50,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:04:50,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630991786] [2020-12-23 07:04:50,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:04:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:04:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:04:50,645 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand 3 states. [2020-12-23 07:04:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:50,682 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2020-12-23 07:04:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:04:50,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 07:04:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:50,687 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:04:50,689 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:04:50,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:04:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:04:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:04:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:04:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2020-12-23 07:04:50,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 12 [2020-12-23 07:04:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:50,702 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2020-12-23 07:04:50,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:04:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2020-12-23 07:04:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:04:50,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:50,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:50,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:04:50,706 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2020-12-23 07:04:50,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:50,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648868426] [2020-12-23 07:04:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:50,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648868426] [2020-12-23 07:04:50,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:04:50,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:04:50,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732057065] [2020-12-23 07:04:50,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:04:50,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:04:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:04:50,819 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand 3 states. [2020-12-23 07:04:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:50,866 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2020-12-23 07:04:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:04:50,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 07:04:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:50,868 INFO L225 Difference]: With dead ends: 41 [2020-12-23 07:04:50,869 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:04:50,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:04:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:04:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-23 07:04:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:04:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-12-23 07:04:50,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 12 [2020-12-23 07:04:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:50,884 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-12-23 07:04:50,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:04:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2020-12-23 07:04:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:04:50,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:50,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:50,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 07:04:50,888 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash -492890182, now seen corresponding path program 1 times [2020-12-23 07:04:50,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:50,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516078629] [2020-12-23 07:04:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:51,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516078629] [2020-12-23 07:04:51,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:04:51,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:04:51,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085301949] [2020-12-23 07:04:51,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:04:51,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:51,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:04:51,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:04:51,017 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand 4 states. [2020-12-23 07:04:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:51,074 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2020-12-23 07:04:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:04:51,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 07:04:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:51,076 INFO L225 Difference]: With dead ends: 38 [2020-12-23 07:04:51,077 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:04:51,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:04:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:04:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 07:04:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:04:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2020-12-23 07:04:51,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 12 [2020-12-23 07:04:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:51,083 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2020-12-23 07:04:51,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:04:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2020-12-23 07:04:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:04:51,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:51,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:51,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 07:04:51,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1431516133, now seen corresponding path program 1 times [2020-12-23 07:04:51,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:51,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825867503] [2020-12-23 07:04:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:51,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825867503] [2020-12-23 07:04:51,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609595413] [2020-12-23 07:04:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:04:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:51,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:51,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:04:51,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073099814] [2020-12-23 07:04:51,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:04:51,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:04:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:04:51,353 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand 6 states. [2020-12-23 07:04:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:51,428 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2020-12-23 07:04:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:04:51,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 07:04:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:51,430 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:04:51,430 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:04:51,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:04:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:04:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-12-23 07:04:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:04:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2020-12-23 07:04:51,438 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2020-12-23 07:04:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:51,438 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2020-12-23 07:04:51,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:04:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2020-12-23 07:04:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:04:51,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:51,440 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:51,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:04:51,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash -378199360, now seen corresponding path program 2 times [2020-12-23 07:04:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:51,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920592697] [2020-12-23 07:04:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:51,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920592697] [2020-12-23 07:04:51,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198355345] [2020-12-23 07:04:51,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:51,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:51,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:04:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:51,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:51,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:04:51,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183889733] [2020-12-23 07:04:51,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:04:51,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:04:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:04:51,916 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand 7 states. [2020-12-23 07:04:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:52,013 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2020-12-23 07:04:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:04:52,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 07:04:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:52,021 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:04:52,022 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:04:52,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:04:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:04:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2020-12-23 07:04:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:04:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2020-12-23 07:04:52,031 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 13 [2020-12-23 07:04:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:52,031 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2020-12-23 07:04:52,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:04:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2020-12-23 07:04:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:04:52,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:52,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:52,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:52,247 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1643101482, now seen corresponding path program 1 times [2020-12-23 07:04:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124629849] [2020-12-23 07:04:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124629849] [2020-12-23 07:04:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824724754] [2020-12-23 07:04:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:04:52,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:04:52,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:52,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-23 07:04:52,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138937710] [2020-12-23 07:04:52,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:04:52,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:04:52,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:04:52,560 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand 9 states. [2020-12-23 07:04:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:52,900 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2020-12-23 07:04:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:04:52,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 07:04:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:52,903 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:04:52,903 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 07:04:52,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:04:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 07:04:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-12-23 07:04:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:04:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-12-23 07:04:52,932 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 14 [2020-12-23 07:04:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:52,932 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-12-23 07:04:52,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:04:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-12-23 07:04:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:04:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:52,934 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:53,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:53,149 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:53,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2085117765, now seen corresponding path program 3 times [2020-12-23 07:04:53,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:53,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299655080] [2020-12-23 07:04:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299655080] [2020-12-23 07:04:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149198705] [2020-12-23 07:04:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:53,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:04:53,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:53,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:04:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:53,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:53,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 07:04:53,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315874184] [2020-12-23 07:04:53,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:04:53,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:04:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:04:53,381 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 8 states. [2020-12-23 07:04:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:53,531 INFO L93 Difference]: Finished difference Result 109 states and 151 transitions. [2020-12-23 07:04:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:04:53,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 07:04:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:53,534 INFO L225 Difference]: With dead ends: 109 [2020-12-23 07:04:53,534 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:04:53,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:04:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:04:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-12-23 07:04:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:04:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2020-12-23 07:04:53,543 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 14 [2020-12-23 07:04:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:53,544 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2020-12-23 07:04:53,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:04:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2020-12-23 07:04:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:04:53,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:53,545 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:53,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:53,762 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash 834986528, now seen corresponding path program 4 times [2020-12-23 07:04:53,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:53,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977270277] [2020-12-23 07:04:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:53,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977270277] [2020-12-23 07:04:53,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253989240] [2020-12-23 07:04:53,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:53,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:53,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:04:53,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:54,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:54,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:04:54,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63287464] [2020-12-23 07:04:54,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:04:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:04:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:04:54,077 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand 9 states. [2020-12-23 07:04:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:54,270 INFO L93 Difference]: Finished difference Result 127 states and 176 transitions. [2020-12-23 07:04:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:04:54,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 07:04:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:54,272 INFO L225 Difference]: With dead ends: 127 [2020-12-23 07:04:54,272 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 07:04:54,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:04:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 07:04:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 60. [2020-12-23 07:04:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:04:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2020-12-23 07:04:54,292 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 15 [2020-12-23 07:04:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:54,292 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2020-12-23 07:04:54,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:04:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2020-12-23 07:04:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:04:54,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:54,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:54,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:04:54,509 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2020-12-23 07:04:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:54,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549176995] [2020-12-23 07:04:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:04:54,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549176995] [2020-12-23 07:04:54,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631220616] [2020-12-23 07:04:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:04:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:04:54,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:54,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-12-23 07:04:54,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959524419] [2020-12-23 07:04:54,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:04:54,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:54,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:04:54,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:04:54,815 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand 7 states. [2020-12-23 07:04:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:54,877 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-12-23 07:04:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:04:54,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:04:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:54,878 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:04:54,879 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:04:54,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:04:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:04:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 07:04:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 07:04:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-12-23 07:04:54,890 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 16 [2020-12-23 07:04:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:54,891 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-12-23 07:04:54,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:04:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-12-23 07:04:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:04:54,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:54,892 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:55,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:55,104 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1163906395, now seen corresponding path program 5 times [2020-12-23 07:04:55,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:55,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109702469] [2020-12-23 07:04:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:55,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109702469] [2020-12-23 07:04:55,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518694626] [2020-12-23 07:04:55,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:55,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:04:55,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:04:55,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:55,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:55,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:04:55,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049195223] [2020-12-23 07:04:55,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:04:55,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:55,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:04:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:04:55,386 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 10 states. [2020-12-23 07:04:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:55,641 INFO L93 Difference]: Finished difference Result 143 states and 198 transitions. [2020-12-23 07:04:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:04:55,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-23 07:04:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:55,642 INFO L225 Difference]: With dead ends: 143 [2020-12-23 07:04:55,643 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 07:04:55,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:04:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 07:04:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 68. [2020-12-23 07:04:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 07:04:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2020-12-23 07:04:55,664 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 16 [2020-12-23 07:04:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:55,665 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2020-12-23 07:04:55,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:04:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2020-12-23 07:04:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:04:55,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:55,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:55,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:55,886 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2020-12-23 07:04:55,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:55,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186952092] [2020-12-23 07:04:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:04:55,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186952092] [2020-12-23 07:04:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642140746] [2020-12-23 07:04:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:56,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:56,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:04:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:04:56,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:56,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-23 07:04:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794140075] [2020-12-23 07:04:56,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:04:56,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:04:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:04:56,079 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand 4 states. [2020-12-23 07:04:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:56,118 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2020-12-23 07:04:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:04:56,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 07:04:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:56,119 INFO L225 Difference]: With dead ends: 88 [2020-12-23 07:04:56,120 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:04:56,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:04:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:04:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-12-23 07:04:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:04:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 83 transitions. [2020-12-23 07:04:56,130 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 83 transitions. Word has length 17 [2020-12-23 07:04:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:56,131 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 83 transitions. [2020-12-23 07:04:56,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:04:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 83 transitions. [2020-12-23 07:04:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:04:56,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:56,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:56,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:04:56,347 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:56,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 1 times [2020-12-23 07:04:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:56,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269382306] [2020-12-23 07:04:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:04:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269382306] [2020-12-23 07:04:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429687735] [2020-12-23 07:04:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:56,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:04:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:04:56,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:56,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 07:04:56,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383567322] [2020-12-23 07:04:56,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:04:56,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:56,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:04:56,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:04:56,549 INFO L87 Difference]: Start difference. First operand 59 states and 83 transitions. Second operand 9 states. [2020-12-23 07:04:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:56,631 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2020-12-23 07:04:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:04:56,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 07:04:56,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:56,633 INFO L225 Difference]: With dead ends: 90 [2020-12-23 07:04:56,633 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:04:56,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:04:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:04:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2020-12-23 07:04:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:04:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2020-12-23 07:04:56,639 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 17 [2020-12-23 07:04:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:56,639 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2020-12-23 07:04:56,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:04:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2020-12-23 07:04:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:04:56,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:56,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:56,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:56,858 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash 855427872, now seen corresponding path program 2 times [2020-12-23 07:04:56,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:56,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87579167] [2020-12-23 07:04:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:56,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87579167] [2020-12-23 07:04:56,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132847957] [2020-12-23 07:04:56,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:57,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:57,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:04:57,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:04:57,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:57,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2020-12-23 07:04:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947239622] [2020-12-23 07:04:57,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:04:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:04:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:04:57,096 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand 12 states. [2020-12-23 07:04:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:57,770 INFO L93 Difference]: Finished difference Result 131 states and 178 transitions. [2020-12-23 07:04:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:04:57,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-12-23 07:04:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:57,773 INFO L225 Difference]: With dead ends: 131 [2020-12-23 07:04:57,773 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 07:04:57,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:04:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 07:04:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2020-12-23 07:04:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:04:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2020-12-23 07:04:57,782 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 17 [2020-12-23 07:04:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:57,782 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2020-12-23 07:04:57,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:04:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2020-12-23 07:04:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:04:57,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:57,784 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:57,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:04:57,985 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1524479616, now seen corresponding path program 6 times [2020-12-23 07:04:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:57,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633497489] [2020-12-23 07:04:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:58,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633497489] [2020-12-23 07:04:58,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49218263] [2020-12-23 07:04:58,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:58,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:04:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:04:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:58,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:58,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 07:04:58,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536332506] [2020-12-23 07:04:58,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:04:58,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:58,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:04:58,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:04:58,308 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand 11 states. [2020-12-23 07:04:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:58,555 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2020-12-23 07:04:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:04:58,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-23 07:04:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:58,557 INFO L225 Difference]: With dead ends: 195 [2020-12-23 07:04:58,557 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 07:04:58,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:04:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 07:04:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 89. [2020-12-23 07:04:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 07:04:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2020-12-23 07:04:58,565 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 17 [2020-12-23 07:04:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:58,565 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2020-12-23 07:04:58,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:04:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2020-12-23 07:04:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:04:58,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:58,566 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:58,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:04:58,778 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1034899963, now seen corresponding path program 7 times [2020-12-23 07:04:58,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:58,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043540998] [2020-12-23 07:04:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:58,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043540998] [2020-12-23 07:04:58,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056067806] [2020-12-23 07:04:58,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:04:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:04:59,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:59,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:04:59,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184716278] [2020-12-23 07:04:59,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:04:59,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:04:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:04:59,052 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand 12 states. [2020-12-23 07:04:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:59,371 INFO L93 Difference]: Finished difference Result 217 states and 301 transitions. [2020-12-23 07:04:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:04:59,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-23 07:04:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:59,373 INFO L225 Difference]: With dead ends: 217 [2020-12-23 07:04:59,373 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 07:04:59,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:04:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 07:04:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 98. [2020-12-23 07:04:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:04:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 135 transitions. [2020-12-23 07:04:59,384 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 135 transitions. Word has length 18 [2020-12-23 07:04:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:59,384 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 135 transitions. [2020-12-23 07:04:59,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:04:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 135 transitions. [2020-12-23 07:04:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:04:59,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:59,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:59,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:04:59,601 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -429006320, now seen corresponding path program 2 times [2020-12-23 07:04:59,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:59,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955134490] [2020-12-23 07:04:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:04:59,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955134490] [2020-12-23 07:04:59,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745530215] [2020-12-23 07:04:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:59,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:59,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:04:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:04:59,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:59,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 07:04:59,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741507475] [2020-12-23 07:04:59,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:04:59,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:59,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:04:59,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:04:59,829 INFO L87 Difference]: Start difference. First operand 98 states and 135 transitions. Second operand 10 states. [2020-12-23 07:04:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:59,995 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2020-12-23 07:04:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:04:59,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 07:04:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:59,997 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:04:59,997 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 07:04:59,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:04:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 07:05:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2020-12-23 07:05:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:05:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 134 transitions. [2020-12-23 07:05:00,006 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 134 transitions. Word has length 19 [2020-12-23 07:05:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:00,006 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 134 transitions. [2020-12-23 07:05:00,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:05:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 134 transitions. [2020-12-23 07:05:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:05:00,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:00,007 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:00,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:05:00,223 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:00,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:00,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1228711712, now seen corresponding path program 8 times [2020-12-23 07:05:00,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:00,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732449842] [2020-12-23 07:05:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:00,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732449842] [2020-12-23 07:05:00,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426309033] [2020-12-23 07:05:00,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:00,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:05:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:05:00,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:00,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:00,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:05:00,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066945038] [2020-12-23 07:05:00,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:05:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:05:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:05:00,525 INFO L87 Difference]: Start difference. First operand 98 states and 134 transitions. Second operand 13 states. [2020-12-23 07:05:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:00,854 INFO L93 Difference]: Finished difference Result 239 states and 331 transitions. [2020-12-23 07:05:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:05:00,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-12-23 07:05:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:00,856 INFO L225 Difference]: With dead ends: 239 [2020-12-23 07:05:00,856 INFO L226 Difference]: Without dead ends: 220 [2020-12-23 07:05:00,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:05:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-23 07:05:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 107. [2020-12-23 07:05:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:05:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-12-23 07:05:00,866 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 19 [2020-12-23 07:05:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:00,866 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-12-23 07:05:00,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:05:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-12-23 07:05:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:05:00,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:00,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:01,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:01,082 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 3 times [2020-12-23 07:05:01,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:01,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044227458] [2020-12-23 07:05:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:05:01,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044227458] [2020-12-23 07:05:01,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012720283] [2020-12-23 07:05:01,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:01,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:05:01,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:05:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:05:01,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:01,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-12-23 07:05:01,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442451431] [2020-12-23 07:05:01,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:05:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:05:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:05:01,259 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand 5 states. [2020-12-23 07:05:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:01,351 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2020-12-23 07:05:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:05:01,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-23 07:05:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:01,352 INFO L225 Difference]: With dead ends: 138 [2020-12-23 07:05:01,353 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 07:05:01,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:05:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 07:05:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2020-12-23 07:05:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:05:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 150 transitions. [2020-12-23 07:05:01,364 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 150 transitions. Word has length 20 [2020-12-23 07:05:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:01,365 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 150 transitions. [2020-12-23 07:05:01,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:05:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 150 transitions. [2020-12-23 07:05:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:05:01,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:01,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:01,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:01,579 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1617038102, now seen corresponding path program 3 times [2020-12-23 07:05:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:01,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987508578] [2020-12-23 07:05:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:01,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987508578] [2020-12-23 07:05:01,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990690034] [2020-12-23 07:05:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:01,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:05:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:05:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:05:01,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:01,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 07:05:01,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119579141] [2020-12-23 07:05:01,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:05:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:05:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:01,944 INFO L87 Difference]: Start difference. First operand 110 states and 150 transitions. Second operand 15 states. [2020-12-23 07:05:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:04,119 INFO L93 Difference]: Finished difference Result 235 states and 309 transitions. [2020-12-23 07:05:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:05:04,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-12-23 07:05:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:04,121 INFO L225 Difference]: With dead ends: 235 [2020-12-23 07:05:04,121 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 07:05:04,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:05:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 07:05:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 134. [2020-12-23 07:05:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 07:05:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 181 transitions. [2020-12-23 07:05:04,133 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 181 transitions. Word has length 20 [2020-12-23 07:05:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:04,133 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 181 transitions. [2020-12-23 07:05:04,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:05:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 181 transitions. [2020-12-23 07:05:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:05:04,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:04,134 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:04,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:04,347 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1613770395, now seen corresponding path program 9 times [2020-12-23 07:05:04,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:04,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319754125] [2020-12-23 07:05:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:04,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319754125] [2020-12-23 07:05:04,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838226010] [2020-12-23 07:05:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:04,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:05:04,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:05:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:04,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:04,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:05:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676874438] [2020-12-23 07:05:04,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:05:04,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:05:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:05:04,752 INFO L87 Difference]: Start difference. First operand 134 states and 181 transitions. Second operand 14 states. [2020-12-23 07:05:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:05,216 INFO L93 Difference]: Finished difference Result 321 states and 449 transitions. [2020-12-23 07:05:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:05:05,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-23 07:05:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:05,219 INFO L225 Difference]: With dead ends: 321 [2020-12-23 07:05:05,219 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 07:05:05,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 07:05:05,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 145. [2020-12-23 07:05:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 07:05:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 197 transitions. [2020-12-23 07:05:05,231 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 197 transitions. Word has length 20 [2020-12-23 07:05:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:05,231 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 197 transitions. [2020-12-23 07:05:05,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:05:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 197 transitions. [2020-12-23 07:05:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:05:05,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:05,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:05,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:05:05,436 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1969210240, now seen corresponding path program 4 times [2020-12-23 07:05:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:05,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023007609] [2020-12-23 07:05:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:05:05,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023007609] [2020-12-23 07:05:05,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948739263] [2020-12-23 07:05:05,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:05,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:05:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:05:06,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:06,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2020-12-23 07:05:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178070259] [2020-12-23 07:05:06,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:05:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:06,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:05:06,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:05:06,100 INFO L87 Difference]: Start difference. First operand 145 states and 197 transitions. Second operand 12 states. [2020-12-23 07:05:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:06,674 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2020-12-23 07:05:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:05:06,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-23 07:05:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:06,676 INFO L225 Difference]: With dead ends: 158 [2020-12-23 07:05:06,676 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 07:05:06,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:05:06,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 07:05:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-12-23 07:05:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 07:05:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 185 transitions. [2020-12-23 07:05:06,687 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 185 transitions. Word has length 21 [2020-12-23 07:05:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:06,687 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 185 transitions. [2020-12-23 07:05:06,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:05:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 185 transitions. [2020-12-23 07:05:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:05:06,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:06,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:06,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:05:06,902 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1906736576, now seen corresponding path program 3 times [2020-12-23 07:05:06,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:06,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650827996] [2020-12-23 07:05:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:05:07,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650827996] [2020-12-23 07:05:07,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159557040] [2020-12-23 07:05:07,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:07,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:05:07,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:07,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:05:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:05:07,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:07,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:05:07,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572361438] [2020-12-23 07:05:07,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:05:07,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:05:07,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:05:07,161 INFO L87 Difference]: Start difference. First operand 135 states and 185 transitions. Second operand 10 states. [2020-12-23 07:05:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:07,358 INFO L93 Difference]: Finished difference Result 215 states and 274 transitions. [2020-12-23 07:05:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:05:07,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-23 07:05:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:07,360 INFO L225 Difference]: With dead ends: 215 [2020-12-23 07:05:07,360 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 07:05:07,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:05:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 07:05:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 135. [2020-12-23 07:05:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 07:05:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 184 transitions. [2020-12-23 07:05:07,370 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 184 transitions. Word has length 21 [2020-12-23 07:05:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:07,370 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 184 transitions. [2020-12-23 07:05:07,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:05:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 184 transitions. [2020-12-23 07:05:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:05:07,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:07,372 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:07,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:05:07,585 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash -463597504, now seen corresponding path program 10 times [2020-12-23 07:05:07,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:07,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984875187] [2020-12-23 07:05:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:07,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984875187] [2020-12-23 07:05:07,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121164183] [2020-12-23 07:05:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:07,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:07,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:07,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:05:07,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:05:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477335456] [2020-12-23 07:05:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:05:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:05:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:07,881 INFO L87 Difference]: Start difference. First operand 135 states and 184 transitions. Second operand 15 states. [2020-12-23 07:05:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:08,367 INFO L93 Difference]: Finished difference Result 329 states and 457 transitions. [2020-12-23 07:05:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:05:08,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-12-23 07:05:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:08,370 INFO L225 Difference]: With dead ends: 329 [2020-12-23 07:05:08,370 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 07:05:08,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:05:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 07:05:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 146. [2020-12-23 07:05:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 07:05:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 200 transitions. [2020-12-23 07:05:08,384 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 200 transitions. Word has length 21 [2020-12-23 07:05:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:08,384 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 200 transitions. [2020-12-23 07:05:08,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:05:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 200 transitions. [2020-12-23 07:05:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:05:08,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:08,385 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:08,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:05:08,599 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash -437492933, now seen corresponding path program 11 times [2020-12-23 07:05:08,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:08,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348975279] [2020-12-23 07:05:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:08,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348975279] [2020-12-23 07:05:08,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491520157] [2020-12-23 07:05:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:09,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:05:09,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:05:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:09,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:09,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2020-12-23 07:05:09,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947925952] [2020-12-23 07:05:09,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:05:09,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:05:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:09,080 INFO L87 Difference]: Start difference. First operand 146 states and 200 transitions. Second operand 15 states. [2020-12-23 07:05:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:09,681 INFO L93 Difference]: Finished difference Result 355 states and 494 transitions. [2020-12-23 07:05:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:05:09,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-12-23 07:05:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:09,683 INFO L225 Difference]: With dead ends: 355 [2020-12-23 07:05:09,684 INFO L226 Difference]: Without dead ends: 333 [2020-12-23 07:05:09,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:05:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-23 07:05:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 157. [2020-12-23 07:05:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:05:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 216 transitions. [2020-12-23 07:05:09,695 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 216 transitions. Word has length 22 [2020-12-23 07:05:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:09,695 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 216 transitions. [2020-12-23 07:05:09,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:05:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 216 transitions. [2020-12-23 07:05:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:05:09,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:09,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:09,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:05:09,899 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1085075168, now seen corresponding path program 4 times [2020-12-23 07:05:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:09,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558918176] [2020-12-23 07:05:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 07:05:10,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558918176] [2020-12-23 07:05:10,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555147837] [2020-12-23 07:05:10,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:10,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:05:10,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 07:05:10,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:10,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-12-23 07:05:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228548499] [2020-12-23 07:05:10,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:05:10,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:05:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:05:10,182 INFO L87 Difference]: Start difference. First operand 157 states and 216 transitions. Second operand 13 states. [2020-12-23 07:05:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:10,432 INFO L93 Difference]: Finished difference Result 231 states and 300 transitions. [2020-12-23 07:05:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:05:10,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-23 07:05:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:10,434 INFO L225 Difference]: With dead ends: 231 [2020-12-23 07:05:10,434 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 07:05:10,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 07:05:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2020-12-23 07:05:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:05:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 215 transitions. [2020-12-23 07:05:10,445 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 215 transitions. Word has length 23 [2020-12-23 07:05:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:10,445 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 215 transitions. [2020-12-23 07:05:10,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:05:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 215 transitions. [2020-12-23 07:05:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:05:10,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:10,446 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:10,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:10,659 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:10,660 INFO L82 PathProgramCache]: Analyzing trace with hash -641798784, now seen corresponding path program 5 times [2020-12-23 07:05:10,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:10,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741501518] [2020-12-23 07:05:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:05:10,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741501518] [2020-12-23 07:05:10,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927221957] [2020-12-23 07:05:10,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:10,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:05:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:05:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 07:05:10,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:10,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 07:05:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332662373] [2020-12-23 07:05:10,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:05:10,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:10,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:05:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:10,980 INFO L87 Difference]: Start difference. First operand 157 states and 215 transitions. Second operand 15 states. [2020-12-23 07:05:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:12,964 INFO L93 Difference]: Finished difference Result 355 states and 429 transitions. [2020-12-23 07:05:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:05:12,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-12-23 07:05:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:12,966 INFO L225 Difference]: With dead ends: 355 [2020-12-23 07:05:12,966 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 07:05:12,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=2174, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:05:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 07:05:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 144. [2020-12-23 07:05:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 07:05:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 199 transitions. [2020-12-23 07:05:12,980 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 199 transitions. Word has length 23 [2020-12-23 07:05:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:12,981 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 199 transitions. [2020-12-23 07:05:12,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:05:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 199 transitions. [2020-12-23 07:05:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:05:12,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:12,981 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:13,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:05:13,196 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:13,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1390241056, now seen corresponding path program 4 times [2020-12-23 07:05:13,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:13,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538003145] [2020-12-23 07:05:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538003145] [2020-12-23 07:05:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411429561] [2020-12-23 07:05:13,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:13,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:05:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:05:13,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:13,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 07:05:13,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160425098] [2020-12-23 07:05:13,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:05:13,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:05:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:05:13,590 INFO L87 Difference]: Start difference. First operand 144 states and 199 transitions. Second operand 18 states. [2020-12-23 07:05:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:18,054 INFO L93 Difference]: Finished difference Result 320 states and 424 transitions. [2020-12-23 07:05:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 07:05:18,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-12-23 07:05:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:18,056 INFO L225 Difference]: With dead ends: 320 [2020-12-23 07:05:18,056 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 07:05:18,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=666, Invalid=5814, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:05:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 07:05:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 174. [2020-12-23 07:05:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 07:05:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 239 transitions. [2020-12-23 07:05:18,070 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 239 transitions. Word has length 23 [2020-12-23 07:05:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:18,070 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 239 transitions. [2020-12-23 07:05:18,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:05:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 239 transitions. [2020-12-23 07:05:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:05:18,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:18,071 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:18,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:05:18,273 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1880091952, now seen corresponding path program 6 times [2020-12-23 07:05:18,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:18,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436642624] [2020-12-23 07:05:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:05:18,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436642624] [2020-12-23 07:05:18,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467205158] [2020-12-23 07:05:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:18,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:05:18,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:05:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:05:18,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:18,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2020-12-23 07:05:18,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46992349] [2020-12-23 07:05:18,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:05:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:05:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:18,631 INFO L87 Difference]: Start difference. First operand 174 states and 239 transitions. Second operand 15 states. [2020-12-23 07:05:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:18,977 INFO L93 Difference]: Finished difference Result 278 states and 358 transitions. [2020-12-23 07:05:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:05:18,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-12-23 07:05:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:18,979 INFO L225 Difference]: With dead ends: 278 [2020-12-23 07:05:18,979 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 07:05:18,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:05:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 07:05:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 174. [2020-12-23 07:05:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 07:05:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 238 transitions. [2020-12-23 07:05:18,992 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 238 transitions. Word has length 23 [2020-12-23 07:05:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:18,993 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 238 transitions. [2020-12-23 07:05:18,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:05:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 238 transitions. [2020-12-23 07:05:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:05:18,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:18,994 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:19,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:19,205 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 371748768, now seen corresponding path program 12 times [2020-12-23 07:05:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:19,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890065780] [2020-12-23 07:05:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:19,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890065780] [2020-12-23 07:05:19,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099854719] [2020-12-23 07:05:19,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:19,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:05:19,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:05:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:19,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:19,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:05:19,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124077108] [2020-12-23 07:05:19,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:05:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:05:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:05:19,615 INFO L87 Difference]: Start difference. First operand 174 states and 238 transitions. Second operand 17 states. [2020-12-23 07:05:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:20,384 INFO L93 Difference]: Finished difference Result 422 states and 589 transitions. [2020-12-23 07:05:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:05:20,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2020-12-23 07:05:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:20,387 INFO L225 Difference]: With dead ends: 422 [2020-12-23 07:05:20,387 INFO L226 Difference]: Without dead ends: 400 [2020-12-23 07:05:20,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:05:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-12-23 07:05:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 186. [2020-12-23 07:05:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 07:05:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 256 transitions. [2020-12-23 07:05:20,410 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 256 transitions. Word has length 23 [2020-12-23 07:05:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:20,410 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 256 transitions. [2020-12-23 07:05:20,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:05:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 256 transitions. [2020-12-23 07:05:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:05:20,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:20,411 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:20,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:20,627 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash -311562277, now seen corresponding path program 13 times [2020-12-23 07:05:20,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:20,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248295753] [2020-12-23 07:05:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248295753] [2020-12-23 07:05:20,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119821249] [2020-12-23 07:05:20,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:05:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:21,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:21,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:05:21,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201316860] [2020-12-23 07:05:21,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:05:21,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:05:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:05:21,043 INFO L87 Difference]: Start difference. First operand 186 states and 256 transitions. Second operand 18 states. [2020-12-23 07:05:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:21,910 INFO L93 Difference]: Finished difference Result 451 states and 631 transitions. [2020-12-23 07:05:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:05:21,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2020-12-23 07:05:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:21,914 INFO L225 Difference]: With dead ends: 451 [2020-12-23 07:05:21,914 INFO L226 Difference]: Without dead ends: 429 [2020-12-23 07:05:21,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:05:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-12-23 07:05:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 198. [2020-12-23 07:05:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:05:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 274 transitions. [2020-12-23 07:05:21,927 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 274 transitions. Word has length 24 [2020-12-23 07:05:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:21,928 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 274 transitions. [2020-12-23 07:05:21,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:05:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 274 transitions. [2020-12-23 07:05:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:05:21,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:21,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:22,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:05:22,144 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 5 times [2020-12-23 07:05:22,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:22,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823608077] [2020-12-23 07:05:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:05:22,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823608077] [2020-12-23 07:05:22,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540015417] [2020-12-23 07:05:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:22,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:05:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:05:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:05:22,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:22,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-23 07:05:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907362071] [2020-12-23 07:05:22,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:05:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:05:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:05:22,350 INFO L87 Difference]: Start difference. First operand 198 states and 274 transitions. Second operand 6 states. [2020-12-23 07:05:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:22,547 INFO L93 Difference]: Finished difference Result 261 states and 344 transitions. [2020-12-23 07:05:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:05:22,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-23 07:05:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:22,549 INFO L225 Difference]: With dead ends: 261 [2020-12-23 07:05:22,550 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 07:05:22,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:05:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 07:05:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2020-12-23 07:05:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 07:05:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 295 transitions. [2020-12-23 07:05:22,566 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 295 transitions. Word has length 25 [2020-12-23 07:05:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:22,566 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 295 transitions. [2020-12-23 07:05:22,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:05:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 295 transitions. [2020-12-23 07:05:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:05:22,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:22,567 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:22,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:22,782 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -884935634, now seen corresponding path program 7 times [2020-12-23 07:05:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:22,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582566035] [2020-12-23 07:05:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:05:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582566035] [2020-12-23 07:05:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116317656] [2020-12-23 07:05:22,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:05:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:05:23,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:23,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:05:23,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128497571] [2020-12-23 07:05:23,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:05:23,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:23,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:05:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:05:23,072 INFO L87 Difference]: Start difference. First operand 217 states and 295 transitions. Second operand 12 states. [2020-12-23 07:05:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:23,435 INFO L93 Difference]: Finished difference Result 322 states and 415 transitions. [2020-12-23 07:05:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:05:23,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-23 07:05:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:23,438 INFO L225 Difference]: With dead ends: 322 [2020-12-23 07:05:23,438 INFO L226 Difference]: Without dead ends: 308 [2020-12-23 07:05:23,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:05:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-23 07:05:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 217. [2020-12-23 07:05:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 07:05:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 294 transitions. [2020-12-23 07:05:23,459 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 294 transitions. Word has length 25 [2020-12-23 07:05:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:23,459 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 294 transitions. [2020-12-23 07:05:23,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:05:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 294 transitions. [2020-12-23 07:05:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:05:23,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:23,460 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:23,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:05:23,675 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1571156224, now seen corresponding path program 8 times [2020-12-23 07:05:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:23,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320849556] [2020-12-23 07:05:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:05:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320849556] [2020-12-23 07:05:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133069665] [2020-12-23 07:05:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:23,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:05:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:05:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:05:24,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:24,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 17 [2020-12-23 07:05:24,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194380965] [2020-12-23 07:05:24,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:05:24,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:05:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:05:24,065 INFO L87 Difference]: Start difference. First operand 217 states and 294 transitions. Second operand 17 states. [2020-12-23 07:05:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:24,573 INFO L93 Difference]: Finished difference Result 347 states and 441 transitions. [2020-12-23 07:05:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:05:24,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-12-23 07:05:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:24,576 INFO L225 Difference]: With dead ends: 347 [2020-12-23 07:05:24,576 INFO L226 Difference]: Without dead ends: 333 [2020-12-23 07:05:24,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:05:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-23 07:05:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2020-12-23 07:05:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 07:05:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 293 transitions. [2020-12-23 07:05:24,592 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 293 transitions. Word has length 25 [2020-12-23 07:05:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:24,592 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 293 transitions. [2020-12-23 07:05:24,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:05:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 293 transitions. [2020-12-23 07:05:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:05:24,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:24,593 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:24,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:24,808 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:24,808 INFO L82 PathProgramCache]: Analyzing trace with hash -19368192, now seen corresponding path program 14 times [2020-12-23 07:05:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:24,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889421283] [2020-12-23 07:05:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:25,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889421283] [2020-12-23 07:05:25,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824679968] [2020-12-23 07:05:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:25,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:05:25,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:05:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:25,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:25,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:05:25,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372748255] [2020-12-23 07:05:25,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:05:25,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:05:25,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:05:25,250 INFO L87 Difference]: Start difference. First operand 217 states and 293 transitions. Second operand 19 states. [2020-12-23 07:05:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:26,258 INFO L93 Difference]: Finished difference Result 519 states and 727 transitions. [2020-12-23 07:05:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:05:26,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-12-23 07:05:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:26,261 INFO L225 Difference]: With dead ends: 519 [2020-12-23 07:05:26,261 INFO L226 Difference]: Without dead ends: 494 [2020-12-23 07:05:26,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:05:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-12-23 07:05:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 230. [2020-12-23 07:05:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-23 07:05:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 312 transitions. [2020-12-23 07:05:26,281 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 312 transitions. Word has length 25 [2020-12-23 07:05:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:26,282 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 312 transitions. [2020-12-23 07:05:26,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:05:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 312 transitions. [2020-12-23 07:05:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:05:26,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:26,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:26,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:05:26,493 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash -825436775, now seen corresponding path program 6 times [2020-12-23 07:05:26,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:26,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782725310] [2020-12-23 07:05:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:05:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782725310] [2020-12-23 07:05:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254000690] [2020-12-23 07:05:26,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:26,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:05:26,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:05:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:05:27,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:27,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2020-12-23 07:05:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478737304] [2020-12-23 07:05:27,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:05:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:05:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:27,203 INFO L87 Difference]: Start difference. First operand 230 states and 312 transitions. Second operand 15 states. [2020-12-23 07:05:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:27,474 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2020-12-23 07:05:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:05:27,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 07:05:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:27,476 INFO L225 Difference]: With dead ends: 245 [2020-12-23 07:05:27,476 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 07:05:27,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:05:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 07:05:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-12-23 07:05:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 07:05:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 297 transitions. [2020-12-23 07:05:27,491 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 297 transitions. Word has length 26 [2020-12-23 07:05:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:27,492 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 297 transitions. [2020-12-23 07:05:27,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:05:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 297 transitions. [2020-12-23 07:05:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:05:27,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:27,493 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:27,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:05:27,707 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 9 times [2020-12-23 07:05:27,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:27,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980556118] [2020-12-23 07:05:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:05:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980556118] [2020-12-23 07:05:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182811062] [2020-12-23 07:05:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:27,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:05:27,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:05:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 07:05:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 07:05:28,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649557865] [2020-12-23 07:05:28,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:05:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:05:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:05:28,171 INFO L87 Difference]: Start difference. First operand 217 states and 297 transitions. Second operand 18 states. [2020-12-23 07:05:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:30,874 INFO L93 Difference]: Finished difference Result 476 states and 576 transitions. [2020-12-23 07:05:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 07:05:30,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-12-23 07:05:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:30,876 INFO L225 Difference]: With dead ends: 476 [2020-12-23 07:05:30,876 INFO L226 Difference]: Without dead ends: 448 [2020-12-23 07:05:30,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=2974, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:05:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-23 07:05:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 220. [2020-12-23 07:05:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-23 07:05:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 297 transitions. [2020-12-23 07:05:30,894 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 297 transitions. Word has length 26 [2020-12-23 07:05:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:30,894 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 297 transitions. [2020-12-23 07:05:30,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:05:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 297 transitions. [2020-12-23 07:05:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:05:30,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:30,895 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:31,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:05:31,109 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1358585002, now seen corresponding path program 5 times [2020-12-23 07:05:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151510124] [2020-12-23 07:05:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:31,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151510124] [2020-12-23 07:05:31,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127252690] [2020-12-23 07:05:31,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:31,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:05:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:05:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:31,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:31,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2020-12-23 07:05:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037775888] [2020-12-23 07:05:31,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:05:31,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:05:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:05:31,874 INFO L87 Difference]: Start difference. First operand 220 states and 297 transitions. Second operand 17 states. [2020-12-23 07:05:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:33,754 INFO L93 Difference]: Finished difference Result 317 states and 438 transitions. [2020-12-23 07:05:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:05:33,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-12-23 07:05:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:33,757 INFO L225 Difference]: With dead ends: 317 [2020-12-23 07:05:33,757 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 07:05:33,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=2560, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:05:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 07:05:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 228. [2020-12-23 07:05:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-23 07:05:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 305 transitions. [2020-12-23 07:05:33,773 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 305 transitions. Word has length 26 [2020-12-23 07:05:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:33,773 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 305 transitions. [2020-12-23 07:05:33,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:05:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 305 transitions. [2020-12-23 07:05:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:05:33,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:33,774 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:33,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:05:33,977 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:33,978 INFO L82 PathProgramCache]: Analyzing trace with hash 448713851, now seen corresponding path program 15 times [2020-12-23 07:05:33,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:33,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846006343] [2020-12-23 07:05:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846006343] [2020-12-23 07:05:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559149748] [2020-12-23 07:05:34,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:34,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 07:05:34,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:05:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:34,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:34,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:05:34,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189064769] [2020-12-23 07:05:34,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:05:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:34,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:05:34,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:05:34,834 INFO L87 Difference]: Start difference. First operand 228 states and 305 transitions. Second operand 20 states. [2020-12-23 07:05:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:35,973 INFO L93 Difference]: Finished difference Result 563 states and 768 transitions. [2020-12-23 07:05:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:05:35,974 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-12-23 07:05:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:35,976 INFO L225 Difference]: With dead ends: 563 [2020-12-23 07:05:35,976 INFO L226 Difference]: Without dead ends: 538 [2020-12-23 07:05:35,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:05:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-12-23 07:05:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 241. [2020-12-23 07:05:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 07:05:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 324 transitions. [2020-12-23 07:05:35,993 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 324 transitions. Word has length 26 [2020-12-23 07:05:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:35,993 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 324 transitions. [2020-12-23 07:05:35,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:05:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 324 transitions. [2020-12-23 07:05:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:05:35,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:35,994 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:36,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:05:36,198 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:36,199 INFO L82 PathProgramCache]: Analyzing trace with hash -492280992, now seen corresponding path program 10 times [2020-12-23 07:05:36,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:36,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494715330] [2020-12-23 07:05:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 07:05:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494715330] [2020-12-23 07:05:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051931905] [2020-12-23 07:05:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:36,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:36,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:36,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:05:36,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-23 07:05:36,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:05:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004918145] [2020-12-23 07:05:36,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:05:36,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:05:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:05:36,474 INFO L87 Difference]: Start difference. First operand 241 states and 324 transitions. Second operand 13 states. [2020-12-23 07:05:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:36,851 INFO L93 Difference]: Finished difference Result 377 states and 474 transitions. [2020-12-23 07:05:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:05:36,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-23 07:05:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:36,856 INFO L225 Difference]: With dead ends: 377 [2020-12-23 07:05:36,856 INFO L226 Difference]: Without dead ends: 362 [2020-12-23 07:05:36,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:05:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-12-23 07:05:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 241. [2020-12-23 07:05:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 07:05:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2020-12-23 07:05:36,870 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 27 [2020-12-23 07:05:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:36,870 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2020-12-23 07:05:36,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:05:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2020-12-23 07:05:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:05:36,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:36,871 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:37,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 07:05:37,085 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 749364112, now seen corresponding path program 11 times [2020-12-23 07:05:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632115227] [2020-12-23 07:05:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:05:37,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632115227] [2020-12-23 07:05:37,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461390487] [2020-12-23 07:05:37,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:37,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:05:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:05:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:05:37,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:37,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 19 [2020-12-23 07:05:37,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714582783] [2020-12-23 07:05:37,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:05:37,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:37,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:05:37,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:05:37,902 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand 19 states. [2020-12-23 07:05:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:38,552 INFO L93 Difference]: Finished difference Result 404 states and 502 transitions. [2020-12-23 07:05:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:05:38,553 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-12-23 07:05:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:38,555 INFO L225 Difference]: With dead ends: 404 [2020-12-23 07:05:38,555 INFO L226 Difference]: Without dead ends: 389 [2020-12-23 07:05:38,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-23 07:05:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 241. [2020-12-23 07:05:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 07:05:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 322 transitions. [2020-12-23 07:05:38,568 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 322 transitions. Word has length 27 [2020-12-23 07:05:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:38,568 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 322 transitions. [2020-12-23 07:05:38,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:05:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 322 transitions. [2020-12-23 07:05:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:05:38,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:38,569 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:38,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 07:05:38,770 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2074355296, now seen corresponding path program 16 times [2020-12-23 07:05:38,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:38,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225584218] [2020-12-23 07:05:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:39,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225584218] [2020-12-23 07:05:39,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609269660] [2020-12-23 07:05:39,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:39,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:39,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:05:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:39,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:39,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:05:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566117943] [2020-12-23 07:05:39,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:05:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:05:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:05:39,286 INFO L87 Difference]: Start difference. First operand 241 states and 322 transitions. Second operand 21 states. [2020-12-23 07:05:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:40,362 INFO L93 Difference]: Finished difference Result 594 states and 810 transitions. [2020-12-23 07:05:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:05:40,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2020-12-23 07:05:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:40,365 INFO L225 Difference]: With dead ends: 594 [2020-12-23 07:05:40,365 INFO L226 Difference]: Without dead ends: 569 [2020-12-23 07:05:40,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-12-23 07:05:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 254. [2020-12-23 07:05:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-23 07:05:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 341 transitions. [2020-12-23 07:05:40,386 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 341 transitions. Word has length 27 [2020-12-23 07:05:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:40,389 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 341 transitions. [2020-12-23 07:05:40,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:05:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 341 transitions. [2020-12-23 07:05:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:05:40,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:40,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:40,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:40,604 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -528514310, now seen corresponding path program 6 times [2020-12-23 07:05:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413561962] [2020-12-23 07:05:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:05:40,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413561962] [2020-12-23 07:05:40,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46950727] [2020-12-23 07:05:40,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:40,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:05:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:05:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:05:41,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:41,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-23 07:05:41,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003169955] [2020-12-23 07:05:41,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:05:41,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:41,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:05:41,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:05:41,165 INFO L87 Difference]: Start difference. First operand 254 states and 341 transitions. Second operand 21 states. [2020-12-23 07:05:41,914 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-23 07:05:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:49,499 INFO L93 Difference]: Finished difference Result 679 states and 807 transitions. [2020-12-23 07:05:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 07:05:49,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-12-23 07:05:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:49,503 INFO L225 Difference]: With dead ends: 679 [2020-12-23 07:05:49,503 INFO L226 Difference]: Without dead ends: 641 [2020-12-23 07:05:49,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=902, Invalid=7654, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 07:05:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-12-23 07:05:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 288. [2020-12-23 07:05:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 07:05:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 386 transitions. [2020-12-23 07:05:49,526 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 386 transitions. Word has length 28 [2020-12-23 07:05:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:49,527 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 386 transitions. [2020-12-23 07:05:49,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:05:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 386 transitions. [2020-12-23 07:05:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:05:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:49,528 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:49,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:05:49,742 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash 929632539, now seen corresponding path program 17 times [2020-12-23 07:05:49,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:49,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153044046] [2020-12-23 07:05:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153044046] [2020-12-23 07:05:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614477141] [2020-12-23 07:05:50,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:51,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 07:05:51,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:05:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:51,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:51,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:05:51,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369356833] [2020-12-23 07:05:51,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:05:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:51,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:05:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:51,614 INFO L87 Difference]: Start difference. First operand 288 states and 386 transitions. Second operand 22 states. [2020-12-23 07:05:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:53,043 INFO L93 Difference]: Finished difference Result 675 states and 934 transitions. [2020-12-23 07:05:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:05:53,045 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-23 07:05:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:53,047 INFO L225 Difference]: With dead ends: 675 [2020-12-23 07:05:53,047 INFO L226 Difference]: Without dead ends: 647 [2020-12-23 07:05:53,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:05:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-12-23 07:05:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 303. [2020-12-23 07:05:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-23 07:05:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 408 transitions. [2020-12-23 07:05:53,069 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 408 transitions. Word has length 28 [2020-12-23 07:05:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:53,070 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 408 transitions. [2020-12-23 07:05:53,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:05:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 408 transitions. [2020-12-23 07:05:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:05:53,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:53,071 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:53,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:53,276 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash 753826464, now seen corresponding path program 7 times [2020-12-23 07:05:53,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:53,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137915535] [2020-12-23 07:05:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137915535] [2020-12-23 07:05:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130287444] [2020-12-23 07:05:53,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:05:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:05:54,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:54,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-23 07:05:54,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062329538] [2020-12-23 07:05:54,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:05:54,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:54,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:05:54,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:05:54,003 INFO L87 Difference]: Start difference. First operand 303 states and 408 transitions. Second operand 24 states. [2020-12-23 07:05:55,715 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:05:56,054 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:05:57,252 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:05:57,866 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:06:01,790 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:02,874 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:03,935 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:04,201 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:05,359 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:05,723 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:06,024 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:07,025 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:07,306 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:07,645 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:07,917 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:09,013 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 07:06:09,466 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:09,693 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:10,502 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:06:11,149 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:11,436 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:12,891 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:13,174 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:06:14,330 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:14,737 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 07:06:16,506 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:06:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:17,533 INFO L93 Difference]: Finished difference Result 577 states and 760 transitions. [2020-12-23 07:06:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-12-23 07:06:17,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-12-23 07:06:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:17,537 INFO L225 Difference]: With dead ends: 577 [2020-12-23 07:06:17,538 INFO L226 Difference]: Without dead ends: 562 [2020-12-23 07:06:17,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9353 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1903, Invalid=24179, Unknown=0, NotChecked=0, Total=26082 [2020-12-23 07:06:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-23 07:06:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 325. [2020-12-23 07:06:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-23 07:06:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 442 transitions. [2020-12-23 07:06:17,564 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 442 transitions. Word has length 29 [2020-12-23 07:06:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:17,564 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 442 transitions. [2020-12-23 07:06:17,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:06:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 442 transitions. [2020-12-23 07:06:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:06:17,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:17,566 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:17,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 07:06:17,779 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:17,779 INFO L82 PathProgramCache]: Analyzing trace with hash 337769774, now seen corresponding path program 12 times [2020-12-23 07:06:17,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:17,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172641196] [2020-12-23 07:06:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 07:06:18,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172641196] [2020-12-23 07:06:18,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657648840] [2020-12-23 07:06:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:18,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:06:18,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:18,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:06:18,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:06:18,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:18,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 19 [2020-12-23 07:06:18,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895594307] [2020-12-23 07:06:18,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:06:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:06:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:06:18,372 INFO L87 Difference]: Start difference. First operand 325 states and 442 transitions. Second operand 19 states. [2020-12-23 07:06:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:19,156 INFO L93 Difference]: Finished difference Result 494 states and 633 transitions. [2020-12-23 07:06:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:06:19,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-12-23 07:06:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:19,160 INFO L225 Difference]: With dead ends: 494 [2020-12-23 07:06:19,160 INFO L226 Difference]: Without dead ends: 478 [2020-12-23 07:06:19,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:06:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-12-23 07:06:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 325. [2020-12-23 07:06:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-23 07:06:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2020-12-23 07:06:19,174 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 29 [2020-12-23 07:06:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:19,174 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2020-12-23 07:06:19,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:06:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2020-12-23 07:06:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:06:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:19,175 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:19,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:19,390 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1213709248, now seen corresponding path program 13 times [2020-12-23 07:06:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:19,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270076586] [2020-12-23 07:06:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:06:19,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270076586] [2020-12-23 07:06:19,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610118347] [2020-12-23 07:06:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:19,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:06:19,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:06:19,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:19,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:06:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361661544] [2020-12-23 07:06:19,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:06:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:06:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:06:19,758 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand 14 states. [2020-12-23 07:06:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:20,386 INFO L93 Difference]: Finished difference Result 525 states and 666 transitions. [2020-12-23 07:06:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:06:20,387 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-12-23 07:06:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:20,389 INFO L225 Difference]: With dead ends: 525 [2020-12-23 07:06:20,389 INFO L226 Difference]: Without dead ends: 509 [2020-12-23 07:06:20,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:06:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-12-23 07:06:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 325. [2020-12-23 07:06:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-23 07:06:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 440 transitions. [2020-12-23 07:06:20,411 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 440 transitions. Word has length 29 [2020-12-23 07:06:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:20,411 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 440 transitions. [2020-12-23 07:06:20,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:06:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 440 transitions. [2020-12-23 07:06:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:06:20,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:20,412 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:20,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:06:20,627 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash -197034560, now seen corresponding path program 18 times [2020-12-23 07:06:20,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:20,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396190586] [2020-12-23 07:06:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:06:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396190586] [2020-12-23 07:06:21,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061233339] [2020-12-23 07:06:21,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:21,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 07:06:21,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:21,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:06:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:06:22,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:22,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 26 [2020-12-23 07:06:22,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677221723] [2020-12-23 07:06:22,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:06:22,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:06:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:06:22,210 INFO L87 Difference]: Start difference. First operand 325 states and 440 transitions. Second operand 26 states. [2020-12-23 07:06:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:24,592 INFO L93 Difference]: Finished difference Result 786 states and 1089 transitions. [2020-12-23 07:06:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:06:24,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-23 07:06:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:24,597 INFO L225 Difference]: With dead ends: 786 [2020-12-23 07:06:24,598 INFO L226 Difference]: Without dead ends: 758 [2020-12-23 07:06:24,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:06:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-23 07:06:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 341. [2020-12-23 07:06:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-23 07:06:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 464 transitions. [2020-12-23 07:06:24,616 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 464 transitions. Word has length 29 [2020-12-23 07:06:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:24,616 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 464 transitions. [2020-12-23 07:06:24,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:06:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 464 transitions. [2020-12-23 07:06:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:06:24,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:24,617 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:24,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:06:24,821 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash -763976261, now seen corresponding path program 19 times [2020-12-23 07:06:24,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:24,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311524673] [2020-12-23 07:06:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:06:25,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311524673] [2020-12-23 07:06:25,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913809916] [2020-12-23 07:06:25,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:06:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:06:25,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:25,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:06:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548787132] [2020-12-23 07:06:25,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:06:25,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:06:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:06:25,539 INFO L87 Difference]: Start difference. First operand 341 states and 464 transitions. Second operand 24 states. [2020-12-23 07:06:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:27,488 INFO L93 Difference]: Finished difference Result 805 states and 1125 transitions. [2020-12-23 07:06:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:06:27,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2020-12-23 07:06:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:27,493 INFO L225 Difference]: With dead ends: 805 [2020-12-23 07:06:27,493 INFO L226 Difference]: Without dead ends: 777 [2020-12-23 07:06:27,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:06:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-12-23 07:06:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 357. [2020-12-23 07:06:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-23 07:06:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 488 transitions. [2020-12-23 07:06:27,518 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 488 transitions. Word has length 30 [2020-12-23 07:06:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:27,518 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 488 transitions. [2020-12-23 07:06:27,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:06:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 488 transitions. [2020-12-23 07:06:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:06:27,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:27,520 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:27,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:06:27,733 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 7 times [2020-12-23 07:06:27,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:27,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944674869] [2020-12-23 07:06:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:06:28,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944674869] [2020-12-23 07:06:28,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584244997] [2020-12-23 07:06:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:28,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:06:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:06:30,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:30,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2020-12-23 07:06:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982272458] [2020-12-23 07:06:30,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:06:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:06:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:06:30,259 INFO L87 Difference]: Start difference. First operand 357 states and 488 transitions. Second operand 18 states. [2020-12-23 07:06:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:30,608 INFO L93 Difference]: Finished difference Result 366 states and 496 transitions. [2020-12-23 07:06:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:06:30,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-12-23 07:06:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:30,612 INFO L225 Difference]: With dead ends: 366 [2020-12-23 07:06:30,612 INFO L226 Difference]: Without dead ends: 341 [2020-12-23 07:06:30,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:06:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-23 07:06:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2020-12-23 07:06:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-23 07:06:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 471 transitions. [2020-12-23 07:06:30,628 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 471 transitions. Word has length 31 [2020-12-23 07:06:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:30,628 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 471 transitions. [2020-12-23 07:06:30,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:06:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 471 transitions. [2020-12-23 07:06:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:06:30,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:30,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:30,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 07:06:30,830 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1097644464, now seen corresponding path program 14 times [2020-12-23 07:06:30,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:30,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671450170] [2020-12-23 07:06:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 07:06:31,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671450170] [2020-12-23 07:06:31,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887642576] [2020-12-23 07:06:31,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:31,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:06:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:31,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:06:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:06:31,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:31,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 19 [2020-12-23 07:06:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116372420] [2020-12-23 07:06:31,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:06:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:06:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:06:31,405 INFO L87 Difference]: Start difference. First operand 341 states and 471 transitions. Second operand 19 states. [2020-12-23 07:06:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:32,284 INFO L93 Difference]: Finished difference Result 499 states and 651 transitions. [2020-12-23 07:06:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:06:32,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-12-23 07:06:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:32,288 INFO L225 Difference]: With dead ends: 499 [2020-12-23 07:06:32,288 INFO L226 Difference]: Without dead ends: 482 [2020-12-23 07:06:32,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:06:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-23 07:06:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 341. [2020-12-23 07:06:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-23 07:06:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 470 transitions. [2020-12-23 07:06:32,309 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 470 transitions. Word has length 31 [2020-12-23 07:06:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:32,309 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 470 transitions. [2020-12-23 07:06:32,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:06:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 470 transitions. [2020-12-23 07:06:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:06:32,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:32,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:32,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:32,524 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash 547947152, now seen corresponding path program 15 times [2020-12-23 07:06:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:32,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138302522] [2020-12-23 07:06:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:06:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138302522] [2020-12-23 07:06:32,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063118702] [2020-12-23 07:06:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:32,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:06:32,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:06:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-23 07:06:33,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:33,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2020-12-23 07:06:33,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444598880] [2020-12-23 07:06:33,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:06:33,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:06:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:06:33,401 INFO L87 Difference]: Start difference. First operand 341 states and 470 transitions. Second operand 24 states. [2020-12-23 07:06:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:40,211 INFO L93 Difference]: Finished difference Result 953 states and 1138 transitions. [2020-12-23 07:06:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-12-23 07:06:40,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-12-23 07:06:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:40,216 INFO L225 Difference]: With dead ends: 953 [2020-12-23 07:06:40,216 INFO L226 Difference]: Without dead ends: 917 [2020-12-23 07:06:40,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=689, Invalid=9817, Unknown=0, NotChecked=0, Total=10506 [2020-12-23 07:06:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2020-12-23 07:06:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 369. [2020-12-23 07:06:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-23 07:06:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 497 transitions. [2020-12-23 07:06:40,231 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 497 transitions. Word has length 31 [2020-12-23 07:06:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:40,232 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 497 transitions. [2020-12-23 07:06:40,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:06:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 497 transitions. [2020-12-23 07:06:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:06:40,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:40,232 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:40,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:40,433 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1030883296, now seen corresponding path program 16 times [2020-12-23 07:06:40,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:40,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050737828] [2020-12-23 07:06:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-23 07:06:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050737828] [2020-12-23 07:06:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008836168] [2020-12-23 07:06:40,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:40,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:06:40,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:40,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:06:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-23 07:06:40,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:40,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:06:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184181542] [2020-12-23 07:06:40,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:06:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:06:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:06:40,856 INFO L87 Difference]: Start difference. First operand 369 states and 497 transitions. Second operand 15 states. [2020-12-23 07:06:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:41,574 INFO L93 Difference]: Finished difference Result 565 states and 710 transitions. [2020-12-23 07:06:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:06:41,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-12-23 07:06:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:41,578 INFO L225 Difference]: With dead ends: 565 [2020-12-23 07:06:41,578 INFO L226 Difference]: Without dead ends: 548 [2020-12-23 07:06:41,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:06:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-12-23 07:06:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 369. [2020-12-23 07:06:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-23 07:06:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 496 transitions. [2020-12-23 07:06:41,593 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 496 transitions. Word has length 31 [2020-12-23 07:06:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:41,593 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 496 transitions. [2020-12-23 07:06:41,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:06:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 496 transitions. [2020-12-23 07:06:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:06:41,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:41,595 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:41,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:06:41,811 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash -840117168, now seen corresponding path program 17 times [2020-12-23 07:06:41,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:41,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834476300] [2020-12-23 07:06:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:06:42,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834476300] [2020-12-23 07:06:42,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19441720] [2020-12-23 07:06:42,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:42,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 07:06:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:06:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:06:43,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:43,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-12-23 07:06:43,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303436482] [2020-12-23 07:06:43,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:06:43,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:43,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:06:43,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:06:43,508 INFO L87 Difference]: Start difference. First operand 369 states and 496 transitions. Second operand 24 states. [2020-12-23 07:06:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:44,418 INFO L93 Difference]: Finished difference Result 597 states and 743 transitions. [2020-12-23 07:06:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:06:44,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-12-23 07:06:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:44,422 INFO L225 Difference]: With dead ends: 597 [2020-12-23 07:06:44,423 INFO L226 Difference]: Without dead ends: 580 [2020-12-23 07:06:44,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:06:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-12-23 07:06:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 369. [2020-12-23 07:06:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-23 07:06:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 495 transitions. [2020-12-23 07:06:44,443 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 495 transitions. Word has length 31 [2020-12-23 07:06:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:44,443 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 495 transitions. [2020-12-23 07:06:44,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:06:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 495 transitions. [2020-12-23 07:06:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:06:44,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:44,445 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:44,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:44,649 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1159299808, now seen corresponding path program 20 times [2020-12-23 07:06:44,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:44,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495434520] [2020-12-23 07:06:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:06:45,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495434520] [2020-12-23 07:06:45,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405787783] [2020-12-23 07:06:45,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:45,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:06:45,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:06:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:06:45,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:45,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:06:45,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157477415] [2020-12-23 07:06:45,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:06:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:06:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:06:45,469 INFO L87 Difference]: Start difference. First operand 369 states and 495 transitions. Second operand 25 states. [2020-12-23 07:06:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:47,658 INFO L93 Difference]: Finished difference Result 864 states and 1198 transitions. [2020-12-23 07:06:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:06:47,659 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2020-12-23 07:06:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:47,663 INFO L225 Difference]: With dead ends: 864 [2020-12-23 07:06:47,663 INFO L226 Difference]: Without dead ends: 833 [2020-12-23 07:06:47,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:06:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2020-12-23 07:06:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 386. [2020-12-23 07:06:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-12-23 07:06:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 520 transitions. [2020-12-23 07:06:47,687 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 520 transitions. Word has length 31 [2020-12-23 07:06:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:47,687 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 520 transitions. [2020-12-23 07:06:47,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:06:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 520 transitions. [2020-12-23 07:06:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:06:47,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:47,688 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:47,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:06:47,902 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1247012492, now seen corresponding path program 18 times [2020-12-23 07:06:47,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:47,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425508015] [2020-12-23 07:06:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:06:48,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425508015] [2020-12-23 07:06:48,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596548848] [2020-12-23 07:06:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:48,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:06:48,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:06:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 07:06:48,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:48,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-23 07:06:48,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660800106] [2020-12-23 07:06:48,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:06:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:06:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:06:48,802 INFO L87 Difference]: Start difference. First operand 386 states and 520 transitions. Second operand 24 states. [2020-12-23 07:06:50,220 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:50,815 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:06:51,051 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:06:51,820 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:06:57,360 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 07:06:59,323 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 07:07:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:05,936 INFO L93 Difference]: Finished difference Result 861 states and 1023 transitions. [2020-12-23 07:07:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-12-23 07:07:05,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-12-23 07:07:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:05,941 INFO L225 Difference]: With dead ends: 861 [2020-12-23 07:07:05,941 INFO L226 Difference]: Without dead ends: 839 [2020-12-23 07:07:05,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1282, Invalid=12760, Unknown=0, NotChecked=0, Total=14042 [2020-12-23 07:07:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2020-12-23 07:07:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 389. [2020-12-23 07:07:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-12-23 07:07:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 522 transitions. [2020-12-23 07:07:05,966 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 522 transitions. Word has length 32 [2020-12-23 07:07:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:05,966 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 522 transitions. [2020-12-23 07:07:05,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:07:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 522 transitions. [2020-12-23 07:07:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:07:05,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:05,968 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:06,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:07:06,181 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash -647695254, now seen corresponding path program 8 times [2020-12-23 07:07:06,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:06,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758601439] [2020-12-23 07:07:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:06,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758601439] [2020-12-23 07:07:06,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908407679] [2020-12-23 07:07:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:06,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:06,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:07:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:07:07,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:07,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-12-23 07:07:07,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776842778] [2020-12-23 07:07:07,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:07:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:07:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:07,246 INFO L87 Difference]: Start difference. First operand 389 states and 522 transitions. Second operand 27 states. [2020-12-23 07:07:08,503 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:07:08,865 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 07:07:09,334 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:09,841 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:07:10,675 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:07:11,384 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:12,016 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:12,729 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:13,131 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:13,857 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:14,463 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:14,800 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:07:15,164 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:07:16,103 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-23 07:07:16,618 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:07:16,992 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:07:17,484 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-23 07:07:18,484 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 07:07:23,402 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:07:24,393 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 07:07:25,206 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:25,848 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 07:07:27,362 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:28,306 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:29,263 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:30,026 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:30,582 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:31,028 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 07:07:31,595 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:32,589 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:33,130 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:33,924 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:34,541 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:35,065 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:36,337 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:37,283 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:38,039 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:38,576 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:39,086 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:39,845 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:41,201 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:41,977 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:07:42,270 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 07:07:42,708 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:43,759 WARN L197 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:44,413 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:44,682 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 07:07:46,170 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-23 07:07:47,063 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:47,794 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:48,381 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:48,819 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:07:50,056 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:07:50,707 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:07:51,389 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 07:07:51,850 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:52,958 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:53,892 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:07:54,982 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:07:55,637 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 07:07:56,092 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:07:56,789 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:07:57,550 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:07:58,367 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-23 07:07:59,181 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:07:59,728 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:08:01,267 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:08:01,964 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:08:03,563 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-23 07:08:04,454 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-23 07:08:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:05,490 INFO L93 Difference]: Finished difference Result 706 states and 936 transitions. [2020-12-23 07:08:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-12-23 07:08:05,492 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-12-23 07:08:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:05,494 INFO L225 Difference]: With dead ends: 706 [2020-12-23 07:08:05,494 INFO L226 Difference]: Without dead ends: 690 [2020-12-23 07:08:05,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14231 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=2553, Invalid=36059, Unknown=0, NotChecked=0, Total=38612 [2020-12-23 07:08:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-12-23 07:08:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 437. [2020-12-23 07:08:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-23 07:08:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 586 transitions. [2020-12-23 07:08:05,516 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 586 transitions. Word has length 32 [2020-12-23 07:08:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:05,516 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 586 transitions. [2020-12-23 07:08:05,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:08:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 586 transitions. [2020-12-23 07:08:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:08:05,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:05,518 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:05,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:08:05,730 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -529427877, now seen corresponding path program 21 times [2020-12-23 07:08:05,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:05,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486737592] [2020-12-23 07:08:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:08:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486737592] [2020-12-23 07:08:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88070785] [2020-12-23 07:08:06,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:07,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 07:08:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:08:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:08:08,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:08,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 31 [2020-12-23 07:08:08,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363597704] [2020-12-23 07:08:08,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:08:08,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:08:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=865, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:08,567 INFO L87 Difference]: Start difference. First operand 437 states and 586 transitions. Second operand 31 states. [2020-12-23 07:08:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:14,541 INFO L93 Difference]: Finished difference Result 1052 states and 1462 transitions. [2020-12-23 07:08:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:08:14,544 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 32 [2020-12-23 07:08:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:14,548 INFO L225 Difference]: With dead ends: 1052 [2020-12-23 07:08:14,548 INFO L226 Difference]: Without dead ends: 1018 [2020-12-23 07:08:14,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:08:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-12-23 07:08:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 456. [2020-12-23 07:08:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-23 07:08:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 614 transitions. [2020-12-23 07:08:14,578 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 614 transitions. Word has length 32 [2020-12-23 07:08:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:14,578 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 614 transitions. [2020-12-23 07:08:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:08:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 614 transitions. [2020-12-23 07:08:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:08:14,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:14,580 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:14,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:08:14,784 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 59915840, now seen corresponding path program 19 times [2020-12-23 07:08:14,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:14,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557421481] [2020-12-23 07:08:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 07:08:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557421481] [2020-12-23 07:08:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369067766] [2020-12-23 07:08:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:15,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:08:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 07:08:15,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:15,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:08:15,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243688708] [2020-12-23 07:08:15,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:08:15,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:15,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:08:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:08:15,551 INFO L87 Difference]: Start difference. First operand 456 states and 614 transitions. Second operand 16 states. [2020-12-23 07:08:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:17,160 INFO L93 Difference]: Finished difference Result 666 states and 848 transitions. [2020-12-23 07:08:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:08:17,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-23 07:08:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:17,165 INFO L225 Difference]: With dead ends: 666 [2020-12-23 07:08:17,165 INFO L226 Difference]: Without dead ends: 648 [2020-12-23 07:08:17,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:08:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-12-23 07:08:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 456. [2020-12-23 07:08:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-23 07:08:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 613 transitions. [2020-12-23 07:08:17,184 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 613 transitions. Word has length 33 [2020-12-23 07:08:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:17,184 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 613 transitions. [2020-12-23 07:08:17,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:08:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 613 transitions. [2020-12-23 07:08:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:08:17,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:17,186 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:17,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 07:08:17,402 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:17,402 INFO L82 PathProgramCache]: Analyzing trace with hash -510917074, now seen corresponding path program 20 times [2020-12-23 07:08:17,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:17,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787125592] [2020-12-23 07:08:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 07:08:17,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787125592] [2020-12-23 07:08:17,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893311306] [2020-12-23 07:08:17,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:18,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:18,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:18,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:08:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:08:18,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:18,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 23 [2020-12-23 07:08:18,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812588856] [2020-12-23 07:08:18,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:08:18,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:18,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:08:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:08:18,795 INFO L87 Difference]: Start difference. First operand 456 states and 613 transitions. Second operand 23 states. [2020-12-23 07:08:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:21,204 INFO L93 Difference]: Finished difference Result 701 states and 885 transitions. [2020-12-23 07:08:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:08:21,207 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-12-23 07:08:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:21,210 INFO L225 Difference]: With dead ends: 701 [2020-12-23 07:08:21,210 INFO L226 Difference]: Without dead ends: 683 [2020-12-23 07:08:21,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:08:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-12-23 07:08:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 456. [2020-12-23 07:08:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-23 07:08:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 612 transitions. [2020-12-23 07:08:21,234 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 612 transitions. Word has length 33 [2020-12-23 07:08:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:21,234 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 612 transitions. [2020-12-23 07:08:21,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:08:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 612 transitions. [2020-12-23 07:08:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:08:21,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:21,236 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:21,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:21,449 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1637709696, now seen corresponding path program 21 times [2020-12-23 07:08:21,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:21,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622619423] [2020-12-23 07:08:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622619423] [2020-12-23 07:08:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160575949] [2020-12-23 07:08:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:21,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:08:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:21,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:08:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 07:08:22,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:22,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2020-12-23 07:08:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103711513] [2020-12-23 07:08:22,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:08:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:08:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:08:22,349 INFO L87 Difference]: Start difference. First operand 456 states and 612 transitions. Second operand 19 states. [2020-12-23 07:08:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:24,967 INFO L93 Difference]: Finished difference Result 788 states and 978 transitions. [2020-12-23 07:08:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:08:24,969 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-12-23 07:08:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:24,972 INFO L225 Difference]: With dead ends: 788 [2020-12-23 07:08:24,972 INFO L226 Difference]: Without dead ends: 734 [2020-12-23 07:08:24,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-12-23 07:08:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 433. [2020-12-23 07:08:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-12-23 07:08:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 573 transitions. [2020-12-23 07:08:24,994 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 573 transitions. Word has length 33 [2020-12-23 07:08:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:24,994 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 573 transitions. [2020-12-23 07:08:24,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:08:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 573 transitions. [2020-12-23 07:08:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:08:24,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:24,995 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:25,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:25,211 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1816732800, now seen corresponding path program 22 times [2020-12-23 07:08:25,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:25,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654341374] [2020-12-23 07:08:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:08:26,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654341374] [2020-12-23 07:08:26,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067782920] [2020-12-23 07:08:26,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:26,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:08:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:08:26,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:26,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:08:26,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202416180] [2020-12-23 07:08:26,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:08:26,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:26,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:08:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:08:26,730 INFO L87 Difference]: Start difference. First operand 433 states and 573 transitions. Second operand 27 states. [2020-12-23 07:08:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:31,321 INFO L93 Difference]: Finished difference Result 1017 states and 1403 transitions. [2020-12-23 07:08:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:08:31,324 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-23 07:08:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:31,328 INFO L225 Difference]: With dead ends: 1017 [2020-12-23 07:08:31,329 INFO L226 Difference]: Without dead ends: 983 [2020-12-23 07:08:31,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:08:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-12-23 07:08:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 451. [2020-12-23 07:08:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-12-23 07:08:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 599 transitions. [2020-12-23 07:08:31,350 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 599 transitions. Word has length 33 [2020-12-23 07:08:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:31,351 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 599 transitions. [2020-12-23 07:08:31,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:08:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 599 transitions. [2020-12-23 07:08:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:08:31,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:31,352 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:31,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-23 07:08:31,567 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1533269755, now seen corresponding path program 23 times [2020-12-23 07:08:31,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:31,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095013119] [2020-12-23 07:08:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:08:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095013119] [2020-12-23 07:08:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034684746] [2020-12-23 07:08:32,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:39,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 07:08:39,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:08:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:08:40,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:40,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:08:40,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354332494] [2020-12-23 07:08:40,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:08:40,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:40,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:08:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:08:40,241 INFO L87 Difference]: Start difference. First operand 451 states and 599 transitions. Second operand 28 states. [2020-12-23 07:08:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:45,180 INFO L93 Difference]: Finished difference Result 1058 states and 1462 transitions. [2020-12-23 07:08:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:08:45,183 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2020-12-23 07:08:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:45,188 INFO L225 Difference]: With dead ends: 1058 [2020-12-23 07:08:45,188 INFO L226 Difference]: Without dead ends: 1024 [2020-12-23 07:08:45,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:08:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-12-23 07:08:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 469. [2020-12-23 07:08:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-12-23 07:08:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 625 transitions. [2020-12-23 07:08:45,211 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 625 transitions. Word has length 34 [2020-12-23 07:08:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:45,211 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 625 transitions. [2020-12-23 07:08:45,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:08:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 625 transitions. [2020-12-23 07:08:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:08:45,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:45,213 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:45,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:45,415 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash -517721504, now seen corresponding path program 22 times [2020-12-23 07:08:45,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:45,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302277451] [2020-12-23 07:08:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:46,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302277451] [2020-12-23 07:08:46,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765540398] [2020-12-23 07:08:46,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:46,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:46,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:08:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:46,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:46,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:08:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348623196] [2020-12-23 07:08:46,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:08:46,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:08:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:08:46,255 INFO L87 Difference]: Start difference. First operand 469 states and 625 transitions. Second operand 17 states. [2020-12-23 07:08:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:48,458 INFO L93 Difference]: Finished difference Result 666 states and 846 transitions. [2020-12-23 07:08:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:08:48,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-12-23 07:08:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:48,464 INFO L225 Difference]: With dead ends: 666 [2020-12-23 07:08:48,464 INFO L226 Difference]: Without dead ends: 647 [2020-12-23 07:08:48,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-12-23 07:08:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 469. [2020-12-23 07:08:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-12-23 07:08:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 624 transitions. [2020-12-23 07:08:48,490 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 624 transitions. Word has length 35 [2020-12-23 07:08:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:48,491 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 624 transitions. [2020-12-23 07:08:48,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:08:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 624 transitions. [2020-12-23 07:08:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:08:48,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:48,494 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:48,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 07:08:48,708 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash 885444192, now seen corresponding path program 23 times [2020-12-23 07:08:48,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:48,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107874157] [2020-12-23 07:08:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-23 07:08:49,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107874157] [2020-12-23 07:08:49,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889632234] [2020-12-23 07:08:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:50,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:08:50,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:50,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:08:50,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:50,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:50,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2020-12-23 07:08:50,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312219965] [2020-12-23 07:08:50,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:08:50,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:08:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:08:50,674 INFO L87 Difference]: Start difference. First operand 469 states and 624 transitions. Second operand 25 states. [2020-12-23 07:08:52,116 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:08:52,735 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:08:53,055 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:08:53,533 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-23 07:08:53,829 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:08:54,183 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:08:55,211 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:08:55,513 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 07:08:56,745 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:08:57,043 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 07:08:57,919 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-23 07:09:03,353 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 31